1995 Maxima with cold start problems
#1
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My 1995 Maxima with 80,000 miles has problems starting when it sits overnight, usually in cold weather. In the last two months, I've replaced the battery, starter, spark plugs, air filter and fuel filter and it still takes two or more tries to crank it before it starts. It sounds like something is draining the battery overnight. Any suggestions would be greatly appreciated.
#2
Try this simple test
Originally posted by moose
My 1995 Maxima with 80,000 miles has problems starting when it sits overnight, usually in cold weather. In the last two months, I've replaced the battery, starter, spark plugs, air filter and fuel filter and it still takes two or more tries to crank it before it starts. It sounds like something is draining the battery overnight. Any suggestions would be greatly appreciated.
My 1995 Maxima with 80,000 miles has problems starting when it sits overnight, usually in cold weather. In the last two months, I've replaced the battery, starter, spark plugs, air filter and fuel filter and it still takes two or more tries to crank it before it starts. It sounds like something is draining the battery overnight. Any suggestions would be greatly appreciated.
#3
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Re: Try this simple test
Originally posted by Daniel B. Martin
Does the engine crank (Rrr-Rrr-Rrr) at normal speed but fail to fire (Vroom)? Please try this simple experiment and report your results. When the engine is cold, turn the key to ON, wait 15 seconds, and then turn the key to START. If the engine starts readily after this brief delay, it could indicate a loss of residual fuel pressure. If the engine is still difficult to start, it could indicate a faulty Engine Coolant Temperature Sensor.
Originally posted by moose
My 1995 Maxima with 80,000 miles has problems starting when it sits overnight, usually in cold weather. In the last two months, I've replaced the battery, starter, spark plugs, air filter and fuel filter and it still takes two or more tries to crank it before it starts. It sounds like something is draining the battery overnight. Any suggestions would be greatly appreciated.
My 1995 Maxima with 80,000 miles has problems starting when it sits overnight, usually in cold weather. In the last two months, I've replaced the battery, starter, spark plugs, air filter and fuel filter and it still takes two or more tries to crank it before it starts. It sounds like something is draining the battery overnight. Any suggestions would be greatly appreciated.
#4
Presumed loss of residual fuel pressure
Originally posted by moose
Daniel, this simple test seemed to work this morning (it was about 30 degrees). I waited 15 seconds with the key in the ON position and then turned the key to START and the engire started readily (Vroom). ...
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Daniel, this simple test seemed to work this morning (it was about 30 degrees). I waited 15 seconds with the key in the ON position and then turned the key to START and the engire started readily (Vroom). ...
[/I]
When your engine is running the fuel rail pressure should stay in the 34 - 43 psi range. When your engine is switched off that pressure should be maintained. This is called residual pressure. The presumed loss of residual pressure can be confirmed by a fuel pressure test. This is done by installing a T-fitting in the rubber fuel line just downstream of the fuel filter. This is a standard diagnostic test. You will find it in Chilton (page 5-3) or Haynes (page 4-3).
What can I do about a loss of residual fuel pressure? ...
An external leak is one which allows the fuel to escape from the fuel system.
It might be caused by
- a leaky rubber fuel line which allows fuel to escape into the atmosphere
- a sticking fuel injector which allows fuel to escape into the intake manifold
An internal leak is one which allows the fuel to escape from the fuel rail back into the fuel tank.
It might be caused by
- a faulty fuel pump check valve
- a bad fuel pressure regulator
There are ways to identify the specific source of the leak but let's get into that only when you are certain that the problem is loss of residual pressure. In the meantime, drive with confidence. This is not a serious problem and you are not aggravating the problem by postponing the repair.
... I've already replaced the fuel filter and had the fuel system and throttle body cleaned. ...
... Do I need to change the fuel to a higher octane level?
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